F9 3453 then DL 1892 at Atlanta
New York LaGuardia → Atlanta → Chattanooga
Timetable, Atlanta time
20:27F9 3453 from New York LaGuardia at the gate
14:30DL 1892 to Chattanooga leaves the gate
18 h 03 apart on the timetable, overnight
DL 1892 leaves 18 h 03 after F9 3453 arrives on the timetable: more than half a day, so not a connection we count.